CN118688912A - Optical communication device and optical signal processing method - Google Patents

Abstract

The present application discloses an optical communication device and an optical signal processing method. The optical communication device includes: two optical emitting devices and two optical receiving devices, and also includes an optical path component and an optical fiber adapter. Among them, the first converging lens encapsulated in the optical emitting device converges the light beam emitted by the light source and provides it to the optical path component; the second converging lens encapsulated in the optical receiving device converges the light beam from the optical path component and provides it to the photoelectric detection element. Since the optical emitting device and the optical receiving device can converge the light beam by themselves, there is no need to configure more lenses in the optical path component to build a complex optical path to achieve optical transmission, thereby saving the material cost of the optical communication device. And by simplifying the optical path and reducing the complexity of the optical path, the process cost is saved. In addition, by reducing the number of lenses used, the optical coupling dimension between the various structural components in the device is correspondingly reduced, thereby improving the production efficiency of the Combo PON product.

Description

Optical communication device and optical signal processing method

This application is a divisional application. The application number of the original application is 202080091875.0, and the original application date is April 9, 2020. The entire contents of the original application are incorporated into this application by reference.

Technical Field

The present application relates to the technical field of optical devices, and in particular to an optical communication device and an optical signal processing method.

Background Art

Optical communication devices are commonly used in the field of optical communication, and are usually used to transmit optical signals and convert optical signals into electrical signals. As the requirements for optical communication rates in optical network services continue to increase, the application of passive optical networks (PONs) faces the challenge of speeding up, which requires the conversion from passive optical networks with lower communication rates to passive optical networks with higher communication rates.

However, PON has a wide coverage area, and the innovation of PON technology also needs to be gradually popularized and promoted. Therefore, it is difficult to achieve a large-scale speed upgrade of PON in a short period of time. In recent years, suppliers of optical communication equipment have successively designed combined passive optical network (Combo PON) products as transitional products in the process of PON speed increase. At present, Combo PON products are compatible with the performance of two different PON devices before and after speed increase: they can be compatible with the access services of PON laid in large quantities in the early stage, and can also meet the access services of PON after speed increase.

For example, the Combo PON product can use a four-way optical communication device to send and receive optical signals of two PONs. The four-way optical communication device includes two optical transmitting ends and two optical receiving ends. For example, the first PON is the PON to be accelerated, and the second PON is the PON after the acceleration. One transmitting end and one receiving end of the four-way optical communication device are used to transmit and receive the optical signal corresponding to the first PON, while the other transmitting end and the other receiving end of the four-way optical communication device are used to transmit and receive the optical signal corresponding to the second PON. In this way, the Combo PON product solves the compatibility problem between low-speed PON and high-speed PON.

The optical communication devices used in the existing Combo PON products have complex structures, which consume a lot of materials during manufacturing, resulting in high material costs and manufacturing process costs. In addition, the complexity of the structure also affects production efficiency.

As the demand for Combo PON products continues to increase, how to reduce the cost of Combo PON products and improve production efficiency while ensuring performance has become a technical problem that needs to be urgently solved in this field.

Summary of the invention

The present application provides an optical communication device and an optical signal processing method to reduce the cost of Combo PON products and improve production efficiency.

In a first aspect of the present application, an optical communication device is provided, the optical communication device comprising: a first optical emitting device, a second optical emitting device, a first optical receiving device, a second optical receiving device, an optical path component and an optical fiber adapter;

The first light emitting device and the second light emitting device respectively encapsulate a light source and a first converging lens, and the first converging lens is used to converge the light beam emitted by the light source and provide it to the optical path component;

An optical path component, used for combining the light beams from the first light emitting device and the second light emitting device and then sending them to the optical fiber adapter;

The optical path component is also used to receive the light beam from the optical fiber adapter and send it to the first light receiving device and the second light receiving device;

A second converging lens and a photoelectric detection element are respectively encapsulated in the first light receiving device and the second light receiving device. The second converging lens is used to converge the light beam received by the optical path component and then provide it to the photoelectric detection element.

The light emitting device and the light receiving device can converge the light beam through the converging lens encapsulated by themselves, so there is no need to arrange too many lenses in the spatial light path outside the light emitting device and the light receiving device, which reduces the number of lenses used and saves materials. At the same time, it reduces the complexity of the spatial light path, saves process costs, and improves production efficiency.

In a first implementation of the first aspect, the optical path component includes: a first filter, a second filter, and a filter component;

The first filter is arranged on the transmission path of the first light beam emitted by the first light emitting device and on the transmission path of the second light beam emitted by the second light emitting device; the first filter is used to transmit the first light beam and reflect the second light beam;

The second filter and the filter assembly are both arranged on the transmission path of the light beam from the optical fiber adapter;

The second filter is used to reflect the light beam with the third wavelength in the light beam from the optical fiber adapter to the first light receiving device;

The filter assembly is used for reflecting the light beam with the fourth wavelength in the light beam from the optical fiber adapter to the second light receiving device.

In combination with the first implementation of the first aspect, in the second implementation of the first aspect, the optical path assembly also includes: a first lens, which is arranged between the first filter and the second filter, and is used to converge the light beam from the first filter and provide it to the second filter; the second filter is also used to transmit the light beam provided by the first lens to the optical fiber adapter.

In combination with the second implementation of the first aspect, in a third implementation of the first aspect, the optical path component also includes: a second lens, which is arranged between the filter component and the optical fiber adapter; the second lens is used to converge the light beam provided by the filter component to the optical fiber adapter, and is used to converge the light beam from the optical fiber adapter and provide it to the filter component when receiving the light beam.

In combination with the first, second or third implementation of the first aspect, the filter assembly includes: a third filter and a fourth filter; the third filter and the second light receiving device are located on the same side of the fourth filter;

The third filter is disposed between the second filter and the optical fiber adapter, and is used to transmit the light beam of the third wavelength to the second filter, and is used to reflect the light beam of the fourth wavelength to the fourth filter;

The fourth filter is used to reflect the light beam from the third filter to the second light receiving device.

In combination with the first, second or third implementation of the first aspect, the optical path component further includes: a fifth filter;

The fifth filter is arranged between the first optical receiving device and the second optical filter; the fifth filter is perpendicular to the optical axis of the second converging lens packaged in the first optical receiving device, and is used to further filter the light beam reflected by the second filter. Through further filtering, the light wave of the detection wavelength corresponding to the photoelectric detection element in the first optical receiving device can be filtered out, thereby optimizing the optical communication quality.

In combination with the first, second or third implementation of the first aspect, the optical path component further includes: a sixth filter;

The sixth filter is arranged between the second optical receiving device and the filter assembly; the sixth filter is perpendicular to the optical axis of the second converging lens packaged in the second optical receiving device, and is used to further filter the light beam reflected by the filter assembly. Through further filtering, the light wave of the detection wavelength corresponding to the photoelectric detection element in the second optical receiving device can be filtered out, thereby optimizing the optical communication quality.

In combination with the first, second or third implementation of the first aspect, the optical path assembly further includes: an optical isolator, the optical isolator is disposed between the first filter and the second filter, and is used to isolate the light transmitted from the second filter to the first filter. The optical isolator isolates the light waves reflected back to the optical emitting device, thereby preventing the optical emitting device from being damaged and avoiding affecting the quality of optical communication.

Optionally, the wavelength of the first light beam and the wavelength of the second light beam are both within the isolation band of the optical isolator, thereby saving the number of optical isolators used.

In combination with the first, second or third implementation of the first aspect, the first converging lens packaged in the first light emitting device and/or the second light emitting device is an aspherical lens.

In combination with the first, second or third implementation manner of the first aspect, both the first light beam and the second light beam are converging light beams.

In combination with the second or third implementation of the first aspect, the first light beam and the second light beam are both parallel light beams.

In combination with the first, second or third implementation of the first aspect, the first light emitting device and the second light emitting device are both packaged in TO56 specifications; the first light receiving device and the second light receiving device are both packaged in TO46 specifications. In this way, the versatility of the materials is improved.

In combination with the second or third implementation of the first aspect, the first lens and the optical fiber adapter together serve as an independent first structural component, and the first light emitting device is optically coupled to the first structural component to form a second structural component.

In combination with the second or third implementation of the first aspect, the first lens and the first light emitting device together serve as an independent third structural component, and the optical fiber coupler is optically coupled to the third structural component to form a fourth structural component.

In combination with the above-mentioned assembly implementation method, by reducing the number of lenses, the coupling dimension in the assembly process is reduced, thereby improving the assembly production efficiency.

In a second aspect of the present application, a method for processing an optical signal is provided. The method is applied to an optical communication device provided in any one of the implementations of the first aspect. The method includes:

When the first light emitting device and the second light emitting device are both in the emitting state, the light beams emitted by the first light emitting device and the second light emitting device are combined by the optical path component and then sent to the optical fiber adapter;

When a light beam is received from the optical fiber adapter, the light beam is processed and then sent to a corresponding light receiving device among the first light receiving device and the second light receiving device.

In conjunction with the second aspect, in a possible implementation, when a light beam is received from the optical fiber adapter, the light beam is processed and then sent to a corresponding light receiving device among the first light receiving device and the second light receiving device, specifically including:

When the light beam from the optical fiber adapter includes a light beam with a third wavelength and a light beam with a fourth wavelength, the light beam from the optical fiber adapter is split, the light beam with the third wavelength is sent to the first optical receiving device, and the light beam with the fourth wavelength is sent to the second optical receiving device.

It can be seen from the above technical solutions that the embodiments of the present application have the following advantages:

The optical communication device provided in the present application includes: two optical emitting devices and two optical receiving devices, and also includes: an optical path component and an optical fiber adapter. Among them, the two optical emitting devices and the two optical receiving devices are respectively encapsulated with converging lenses, and the first converging lens of the optical emitting device converges the light beam emitted by the light source and provides it to the optical path component; the second converging lens in the optical receiving device converges the light beam from the optical path component and provides it to the photoelectric detection element. Since the optical emitting device and the optical receiving device can converge the light beam by themselves, there is no need to configure more lenses in the optical path component to build a complex optical path to achieve optical transmission, which saves the material cost of the optical communication device. And by simplifying the optical path and reducing the complexity of the optical path, the process cost is saved. In addition, by reducing the number of lenses used, the optical coupling dimension between the various structural components in the device is correspondingly reduced, thereby improving the production efficiency of the Combo PON product.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic diagram of the structure of an optical communication device provided in an embodiment of the present application;

FIG2 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application;

FIG3 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application;

FIG4 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application;

FIG5 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application;

FIG6 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application;

FIG. 7 is a schematic diagram of the structure of another optical communication device provided in an embodiment of the present application.

DETAILED DESCRIPTION

Among the optical communication devices used in current Combo PON products, taking the four-way optical communication device as an example, in order to build a parallel optical path, it is often necessary to use at least 5 lenses in the spatial optical path outside the four ends (two optical emitting devices and two optical receiving devices). And encapsulate the flat window lens in the optical emitting device and the optical receiving device. The flat window lens has no effect on the direction of the light beam, so in the optical communication device, only the lenses set in the spatial optical path outside the four ends can be relied on to ensure the collimation and convergence of the light beam. The optical communication device consumes a large number of lenses, the optical path is complex, the processing is difficult and the production efficiency is low, resulting in a high production cost of the optical communication device.

Based on the above problems, after research, the embodiments of the present application provide a new type of optical communication device and optical signal processing method. In the embodiments of the present application, the first converging lens encapsulated inside the optical emitting device enables the optical emitting device itself to have the function of converging the light beam, and the second converging lens encapsulated inside the optical receiving device enables the optical receiving device itself to have the function of converging the light beam. The optical communication device realized by the above method greatly reduces the number of lenses required, reduces the complexity of the optical path, can save material costs and process costs in the production process, and effectively improves production efficiency.

For ease of understanding, the following embodiments are described and illustrated by taking a four-way optical communication device as an example. In practical applications, the technical solution protected by the embodiments of the present application is not limited to a four-way optical communication device, that is, the number of optical emitting devices and optical receiving devices therein is not limited.

The implementation method of the optical communication device X1 provided in the embodiment of the present application is described below with reference to the accompanying drawings.

Referring to Fig. 1, which is a schematic diagram of the structure of an optical communication device X1 provided in an embodiment of the present application. As shown in Fig. 1, the optical communication device X1 provided in this embodiment includes: a first optical emitting device 100, a second optical emitting device 200, a first optical receiving device 300, a second optical receiving device 400, an optical path component 500 and an optical fiber adapter 600.

The first optical emitting device 100 and the second optical emitting device 200 serve two different PON services respectively, and the first optical receiving device 300 and the second optical receiving device 400 serve two different PON services respectively. Generally speaking, the working wavelengths of the four ends are different. Assume that the wavelength of the light wave emitted by the first optical emitting device 100 is λ1, the wavelength of the light wave emitted by the second optical emitting device 200 is λ2, the wavelength of the light wave received by the first optical receiving device 300 is λ3, and the wavelength of the light wave received by the second optical receiving device is λ4.

In an exemplary implementation, λ1＞λ2＞λ3＞λ4. The first optical transmitter 100 and the second optical receiver 400 serve the business of 10G EPON (Ten Giga-bit-rate Ethernet Passive Optical Network), wherein the first optical transmitter 100 transmits light of wavelength λ1＝1577nm when in operation, and the second optical receiver 400 receives light of wavelength λ4＝1270nm when in operation. The second optical transmitter 200 and the first optical receiver 300 serve the business of Giga-bit-rate Passive Optical Network (GPON), wherein the second optical transmitter 200 transmits light of wavelength λ2＝1490nm when in operation, and the first optical receiver 300 receives light of wavelength λ3＝1310nm when in operation. In this exemplary implementation, GPON is used as the PON to be accelerated, and 10G EPON is used as the PON after acceleration.

In this embodiment, the first light emitting device 100, the second light emitting device 200, the first light receiving device 300, and the second light receiving device 400 are respectively packaged with a converging lens. The converging lens can be used as a cap for packaging the light emitting devices 100 and 200 and the light receiving devices 300 and 400. For the sake of distinction, the converging lens packaged in the two light emitting devices 100 and 200 is called a first converging lens; the converging lens packaged in the two light receiving devices 300 and 400 is called a second converging lens.

In addition, the two light emitting devices 100 and 200 also include a light source respectively; the two light receiving devices 300 and 400 also include a photodetection element respectively. As an example, the photodetection element can be an avalanche photodiode chip. When the first light receiving device 300 and the second light receiving device 400 are working, the second converging lens packaged in each of them converges the light beam onto the avalanche photodiode chip, and the avalanche photodiode chip realizes the conversion from optical signal to electrical signal.

For the light emitting devices 100 and 200, the packaged first converging lens can serve as the last optical element through which the light emitted by the light source passes in the light emitting device; for the light receiving devices 300 and 400, the packaged second converging lens can serve as the first optical element through which the light received by the light receiving device from the outside passes in the device.

As a possible implementation, the first converging lens packaged in the first light emitting device 100 and/or the second light emitting device 200 may be an aspheric lens. The aspheric lens is packaged in the light emitting device to improve the optical coupling efficiency between the light emitting device and other devices, reduce the influence of aberration, and improve the transmission quality of light.

As a possible implementation, the second converging lens packaged in the first optical receiving device 300 and/or the second optical receiving device 400 may be any one of the following: a water drop lens, a spherical lens, or an aspherical lens. Packaging a water drop lens in an optical receiving device is a fast and relatively inexpensive implementation.

By encapsulating the first converging lens, the first light emitting device 100 and the second light emitting device 200 have the function of converging light beams, and the light beam emitted by the light source is converged by the first converging lens and provided to the optical path component 500; by encapsulating the second converging lens, the first light receiving device 300 and the second light receiving device 400 have the function of converging light beams, and the light from the optical path component 500 is converged by the second converging lens and provided to the photoelectric detection element. In this way, the number of lenses that need to be installed in the spatial optical path outside the light receiving device and the light emitting device is reduced.

In a possible implementation, the first optical emitting device 100 and the second optical emitting device 200 are in the TO56 coaxial packaging specification; the first optical receiving device 300 and the second optical receiving device 400 are in the TO46 coaxial packaging specification. The optical emitting devices packaged in the above specifications improve the material versatility compared to the optical emitting devices packaged in the TO38 specification in the industry.

The optical communication device X1 provided in the embodiment of the present application can complete the single-fiber bidirectional transceiver function. The device X1 and the outside world specifically perform interactive transmission of optical signals through the optical fiber adapter 600. The main function of the optical path component 500 in the device X1 is to process the light beam, such as combining and splitting. The function of the optical path component 500 is described in detail below.

In the optical communication device X1, the first optical emitting device 100 and the second optical emitting device 200 are usually continuously in the working state, that is, the first optical emitting device 100 continuously emits the light wave of the wavelength λ1, and the second optical emitting device 200 continuously emits the light wave of the wavelength λ2. The working state of the first optical receiving device 300 and the second optical receiving device 400 depends on the optical communication device X1 receiving the light wave containing the wavelengths λ3 and λ4 through the optical fiber adapter 600. For example, if the optical communication device X1 receives the light wave containing the wavelength λ3, the first optical receiving device 300 works to convert the received light wave containing the wavelength λ3 into an electrical signal; similarly, if the optical communication device X1 receives the light wave containing the wavelength λ4, the second optical receiving device 400 works to convert the received light wave containing the wavelength λ4 into an electrical signal.

In the embodiment of the present application, the function of the optical path component 500 is reflected in two aspects. On the one hand, when the optical communication device X1 is used to transmit an optical signal to the outside world, the optical path component 500 is used to combine the light beams emitted by the first optical emitting device 100 and the second optical emitting device 200 and then send them to the optical fiber adapter 600. On the other hand, when the optical communication device X2 is used to receive an optical signal transmitted from the outside world, the optical path component 500 is also used to process the light beam received from the optical fiber adapter 600 and then send it to the corresponding optical receiving device among the first optical receiving device 300 and the second optical receiving device 400. Specifically, if the light beam received by the optical path component 500 from the optical fiber receiver 600 includes both light waves with a wavelength of λ3 and a wavelength of λ4, the optical path component 500 is specifically used to split the light beam, provide the light wave with a wavelength of λ3 to the first optical receiving device 300, and provide the light wave with a wavelength of λ4 to the second optical receiving device.

In practical applications, the optical path component 500 includes a variety of possible implementations. For example, no lens is provided in the optical path component 500, one lens is provided, or two lenses are provided. For the four-terminal optical communication device commonly used in the industry, 5 to 6 lenses are usually required to be provided in the spatial optical path outside the four ends to build a parallel optical path, and a flat window lens is encapsulated inside the four ends, so a large number of lenses are used. However, in the embodiment of the present application, the flat window lens is replaced by a first converging lens and encapsulated in the optical emitting devices 100 and 200, and the flat window lens is replaced by a second converging lens and encapsulated in the optical receiving devices 300 and 400. The optical path component 500 only uses 0 to 2 lenses to converge the light beams emitted by the optical emitting devices 100 and 200 to the optical fiber adapter 600, and the light beams from the optical fiber adapter 600 are provided to the optical receiving devices 300 or 400 of the corresponding wavelengths through processing. It can be seen that the optical communication device X1 provided in the embodiment of the present application reduces the materials required to be used. Compared with the parallel optical path, the bidirectional transceiver function of the device X1 is realized mainly by constructing a convergent optical path in this embodiment, and the complexity of the optical path is reduced due to the reduction in the number of lenses, thereby saving process costs. In addition, by integrating convergent lenses at four ends and reducing the number of lenses used in the optical path component 500, the optical coupling dimension in the device X1 is reduced, saving production time and improving production efficiency.

As mentioned above, the optical path component 500 includes multiple possible implementations, such as no lens, one lens, or two lenses. To facilitate understanding of the multiple variations of the optical path component 500, the following is a description in conjunction with the accompanying drawings.

First, the implementation method of not providing a lens in the optical path component 500 is introduced.

Fig. 2 is a schematic diagram of the structure of another optical communication device X2 provided in an embodiment of the present application. In the optical communication device X2 shown in the figure, the structure of the four terminals (100, 200, 300 and 400) is basically the same as that of Fig. 1, so the structure of the four terminals is not repeated here.

The optical path component 500 of the optical communication device X2 includes: a first filter 501, a second filter 502 and a filter component 50S. The first filter 501 is arranged on the transmission path of the first light beam (wavelength λ1) emitted by the first light emitting device 100 and on the transmission path of the second light beam (wavelength λ2) emitted by the second light emitting device 200. The first filter 501 is used to transmit the first light beam and reflect the second light beam.

The second filter 502 and the filter assembly 50S are both arranged on the transmission path of the light beam from the optical fiber adapter 600. The second filter 502 is used to reflect the light beam with the third wavelength (λ3) from the optical fiber adapter 600 to the first optical receiving device 300; the filter assembly 50S is used to reflect the light beam with the fourth wavelength (λ4) from the optical fiber adapter 600 to the second optical receiving device 400.

As shown in FIG2 , in actual application, the filter assembly 50S can be specifically arranged between the optical transmission path of the optical fiber adapter 600 and the second optical filter 502, so the second optical filter 502 can specifically provide the light transmitted by the filter assembly 50S to the first light receiving device 300. The second optical filter 502 and the filter assembly 50S can be specifically arranged on the optical transmission path of the first optical filter 501 and the optical fiber adapter 600, and the first light beam transmitted by the first optical filter 501 and the second light beam reflected by the first optical filter 501 are successively transmitted by the second optical filter 501 and the filter assembly 50S, and then converge to the optical fiber adapter 600.

In the optical communication device X2 shown in FIG2 , the light emitted by the first light emitting device 100 and the second light emitting device 200 are both convergent light. Therefore, even if the optical path component 500 does not include a lens, the first light beam and the second light beam can also converge to the optical fiber adapter 600 .

In the implementation of the optical path component 500 of FIG2 , the filter component 50S includes a plurality of filters: a third filter 503 and a fourth filter 504. In this implementation, the third filter 503 and the second optical receiving device 400 are located on the same side of the fourth filter 504. The third filter 503 of the filter component 50S is disposed between the second filter 502 and the optical fiber adapter 600, and the third filter 503 is used to transmit the light beam of the third wavelength to the second filter 502, and to reflect the light beam of the fourth wavelength to the fourth filter 504. Since the third filter 503 and the second optical receiving device 400 are located on the same side of the fourth filter 504, after the third filter 503 reflects the light beam to the fourth filter 504, the fourth filter 504 can reflect the light beam incident to itself again to the second optical receiving device 400 located on the same side as the third filter 503. Finally, the second optical receiving device 400 completes the reception and photoelectric conversion of the light wave containing the wavelength λ4.

In the implementation shown in FIG2 , the filter assembly 50S reflects the light wave containing the wavelength λ4 successively through two filters 503 and 504. In practical applications, the filter assembly 50S is not limited to the implementation shown in FIG2 . Referring to FIG3 , this figure is a schematic diagram of the structure of another optical communication device X3 provided in an embodiment of the present application. Compared with the optical communication device X2, in the optical communication device X3 illustrated in FIG3 , the difference is that the filter assembly 50S only includes the seventh filter 507. The seventh filter 507 independently completes the function of the filter assembly 50S, that is, reflects the light wave containing the wavelength λ4 to the second optical receiving device 400 once, and transmits the light wave containing the wavelength λ3 to the second filter 502, so that the second filter 502 then reflects the light wave to the first optical receiving device 300.

Compared with the device X2, the optical communication device X3 realizes a single reflection of the λ4 wavelength light wave through the single filter 507 in the filter assembly 50S, which saves the number of filters used and further simplifies the optical path design. In order to facilitate the understanding of the filter setting method in the optical communication devices X2 and X3, an example implementation method is described below.

In this embodiment, the direction from the first light emitting device 100 to the optical fiber adapter 600 along the optical axis of the first converging lens of the first light emitting device 100 is set as the first direction. As an example, in the optical communication devices X2 and X3, the angle between the first filter 501 and the first direction is 135°; the angle between the second filter 502 and the first direction is 45°. For the optical communication device X2, the angle between the third filter 503 and the first direction is greater than 45° and less than 90°; the angle between the fourth filter 504 and the first direction is greater than 0° and less than 45°. For the optical communication device X3, the angle between the seventh filter 507 and the first direction is 135°.

It should be noted that the filter setting angles provided in the above examples are not intended to limit the actual setting angles. In practical applications, the positions of the filters can be set according to the actual requirements of the optical communication device for the occupied space, as well as the assembly method and assembly position of the four ends. Therefore, this embodiment does not specifically limit the setting angles of the filters.

In order to ensure the quality of the transmitted signal in practical applications and prevent the reverse light beam from entering the first light emitting device 100 and the second light emitting device 200 and causing damage to the devices, in the optical communication device shown in Figures 2 and 3, the optical path component 500 may further include an optical isolator 508.

As a possible implementation, the optical isolator 508 can be disposed between the first filter 501 and the second filter 502. The optical isolator 508 allows light to pass in the forward direction and cuts off light in the reverse direction. Therefore, the first light beam and the second light beam can be transmitted along the optical isolator 508 in the direction where the second filter is located, but the light transmitted in the reverse direction from the second filter 502 to the first filter 501 is blocked by the optical isolator 508. In practical applications, the optical isolator 508 used can be a double-stage optical isolator. In order to save costs, the optical isolator 508 used can also be a single-stage optical isolator. When a single-stage optical isolator 508 is selected, it is required that the wavelengths of the light beams emitted by the first light emitting device 100 and the second light emitting device 200 are both within the isolation band of the optical isolator 508. That is, the selected single-stage optical isolator 508 is required to have a unidirectional isolation effect on λ1 and λ2.

The optical communication device provided in the above embodiment may have the following problems in practical application: 1) The second filter 502 mixes and reflects light waves of wavelengths other than λ3 to the first optical receiving device 300; 2) The filter component 50S mixes and reflects light waves of wavelengths other than λ4 to the second optical receiving device 400. Problem 1) may affect the quality of the optical signal received by the first optical receiving device 300, thereby affecting the functional realization of the first optical receiving device 300. Similarly, problem 2) may affect the quality of the optical signal received by the second optical receiving device 400, thereby affecting the functional realization of the second optical receiving device 400.

For the above problem 1), as shown in Figures 2 and 3, the optical path component 500 of the optical communication device provided in the embodiment of the present application may further include: a fifth filter 505. The fifth filter 505 can be arranged between the first optical receiving device 300 and the second filter 502. In one implementation, the fifth filter 505 is perpendicular to the optical axis of the second converging lens encapsulated in the first optical receiving device 300. Before the light enters the first optical receiving device 300, the fifth filter 505 further filters the light beam reflected by the second filter 502, that is, filters out light waves other than the wavelength of λ3. Thereby ensuring that the wavelength of the light beam entering the first optical receiving device 300 meets the service requirements of the PON served by the first optical receiving device 300.

For the above-mentioned problem 2), as shown in FIG. 2 and FIG. 3, the optical path component 500 of the optical communication device provided in the embodiment of the present application may further include: a sixth filter 506. The sixth filter 506 may be arranged between the second optical receiving device 400 and the filter component 50S. In one implementation, the sixth filter 506 is perpendicular to the optical axis of the second converging lens encapsulated in the second optical receiving device 400. Before the light enters the second optical receiving device 400, the sixth filter 506 further filters the light beam reflected and provided by the filter component 50S, that is, filters out light waves other than the wavelength of λ4. Thereby, it is ensured that the wavelength of the light beam entering the second optical receiving device 400 meets the service requirements of the PON served by the second optical receiving device 400.

Next, the implementation method of setting a lens in the optical path component 500 is introduced.

See Figure 4, which is a schematic diagram of the structure of another optical communication device X4 provided in an embodiment of the present application. In the optical communication device X4 illustrated in the figure, the structure of the four terminals (100, 200, 300 and 400) is basically the same as that in Figure 1, so the structure of the four terminals is not repeated here. In addition, the various passive components (isolator 508 and filters 501-506) included in the optical communication device X2 shown in Figure 2 are also included in the optical path component 500 of the optical communication device X4. The setting method and function of the above-mentioned passive components have been explained one by one in the previous embodiment, so they are not repeated here.

It should be noted that, in the optical communication device X4 provided in the embodiment of the present application, the optical isolator 508, the fifth optical filter 505 and the sixth optical filter 506 are respectively optional passive components, but not necessary passive components.

Different from the device X2 shown in FIG2 , the optical path component 500 in the optical communication device provided in FIG4 further includes: a first lens L1. The first lens L1 is disposed between the first filter 501 and the second filter 502, and is used to converge the light beam from the first filter 501 and provide it to the second filter 502. In this embodiment, the second filter 502 is also used to transmit the light beam provided by the first lens L1 to the optical fiber adapter 600.

4 , in the device X4 , the function of the first lens L1 is mainly to converge the first light beam transmitted by the first filter 501 and the second light beam reflected by the first filter 501 , so that the light beams converge to the optical fiber adapter 600 through the first lens L1 .

In this embodiment, the optical isolator 508 may be disposed between the first optical filter 501 and the first lens L1, as shown in FIG4 . As another optional implementation, the optical isolator 508 may also be disposed between the first lens L1 and the second optical filter 502 .

In Fig. 4, the filter assembly 50S of the optical path assembly 500 specifically includes a third filter 503 and a fourth filter 504. Similar to Fig. 3, in order to save the number of filters used and simplify the optical path, the third filter 503 and the fourth filter 504 in the filter assembly 50S in the optical path assembly 500 shown in Fig. 4 can also be replaced by an independent seventh filter, as shown in Fig. 5.

As shown in FIG5, this figure is a schematic diagram of the structure of another optical communication device X5 provided in an embodiment of the present application. The difference between FIG5 and FIG4 is that the implementation method of the filter component 50S is different. In the optical communication device X5, the filter component 50S includes a seventh filter 507. A single reflection of the seventh filter 507 can reflect the light wave containing the λ4 wavelength to the second light receiving device 400. In this way, the number of filters is saved and the optical path is further simplified.

It should be noted that, since the optical path component 500 of the optical communication device shown in FIG4 and FIG5 includes a first lens L1 that can realize the focusing function, no matter whether the two light emitting devices 100 and 200 emit parallel light beams or convergent light beams, the optical path component 500 can converge them to the optical fiber adapter 600. In other words, the first light beam and the second light beam can both be parallel light beams or convergent light beams.

In the optical communication device shown in FIG4 and FIG5, if the first light beam and the second light beam are both converging light beams, the first lens L1 converts the converging light beam into a converging light beam again, thereby extending the optical path and converging the first light beam and the second light beam at a farther distance from the light emitting device. On the incident side of the first lens L1, the numerical aperture of the light spot may be significantly different from the numerical aperture of the light spot required by the optical fiber adapter 600, resulting in poor coupling efficiency. However, by using the first lens L1, by repeatedly converging the light beam, the numerical aperture of the light spot of the light beam converging to the optical fiber adapter 600 is closer to the numerical aperture of the light spot required by the optical fiber adapter 600, thereby improving the optical coupling efficiency.

Next, the implementation method of setting two lenses in the optical path component 500 is introduced.

See Figure 6, which is a schematic diagram of the structure of another optical communication device X6 provided in an embodiment of the present application. In the optical communication device X6 illustrated in the figure, the structure of the four terminals (100, 200, 300 and 400) is basically the same as that in Figure 1, so the structure of the four terminals is not repeated here. In addition, the passive components (first lens L1, isolator 508 and filters 501-506) included in the optical communication device X4 shown in Figure 4 are also included in the optical path component 500 of the optical communication device X4. The setting method and function of the above-mentioned passive components have been explained one by one in the previous embodiment, so they are not repeated here.

It should be noted that, in the optical communication device X6 provided in the embodiment of the present application, the optical isolator 508, the fifth optical filter 505 and the sixth optical filter 506 are respectively optional passive components, but not necessary passive components.

Different from the device X4 shown in FIG4 , the optical path component 500 in the optical communication device provided in FIG6 further includes: a second lens L2. The second lens L2 is disposed between the filter component 50S and the optical fiber adapter 600. The second lens L2 is used to converge the light beam provided by the filter component 50S to the optical fiber adapter 600, and is used to converge the light beam provided by the filter component 50S to the optical fiber adapter 600 when receiving the light beam from the optical fiber adapter 600 and provide the light beam to the filter component 50S.

In this embodiment, the first light beam and the second light beam may be parallel light beams or convergent light beams. When the first light beam emitted by the first light emitting device 100 and the second light beam emitted by the second light emitting device 200 are convergent light beams, the first lens L1 and the second lens L2 may be collimating lenses, respectively.

For ease of understanding, the first light beam is used as an example for description. As shown in FIG6 , after the first light emitting device 100 emits a convergent light beam (i.e., the first light beam), the light beam passes through the first filter 501 and then enters the first lens L1. The first lens L1 converts the light beam into parallel light. The parallel light passes through the isolator 508, the second filter 502, the filter assembly 50S, and the second lens L2 in sequence, and is converted into a convergent light beam again by the second lens L2, and finally converges to the optical fiber adapter 600. The transmission of the second light beam is similar to that of the first light beam, and both are first converted into parallel light beams by the first lens L1, and then converted into convergent light beams by the second lens L2, and finally converge to the optical fiber adapter 600. For the receiving end, the optical signal enters the optical path assembly 500 from the optical fiber adapter 600, and the light beam is converted into a parallel light beam by the second lens L2. The light of wavelength λ4 is provided to the second light receiving device 400 through reflection by the filter assembly 50S, and then converged to the photoelectric detection element by the second converging lens encapsulated therein. In addition, the light of wavelength λ3 in the parallel light beam converted by the second lens L2 is provided to the first light receiving device 300 through transmission of the filter component 50S and reflection of the second filter 502, and then converged onto the photodetection element by the second converging lens encapsulated therein.

In this embodiment, the optical isolator 508 may be disposed between the first lens L1 and the second filter 502, as shown in Fig. 6. As another optional implementation, the optical isolator 508 may also be disposed between the first filter 501 and the first lens L1.

In FIG6 , the filter assembly 50S of the optical path assembly 500 specifically includes a third filter 503 and a fourth filter 504. Similar to FIG3 and FIG5 , in order to save the number of filters used and simplify the optical path, the third filter 503 and the fourth filter 504 in the filter assembly 50S in the optical path assembly 500 shown in FIG4 can also be replaced by an independent seventh filter 507, and specific reference can be made to the optical communication device X7 shown in FIG7 . The light wave containing the wavelength λ4 can be reflected to the second optical receiving device 400 by a single reflection of the seventh filter 507. In this way, the number of filters is saved and the optical path is further simplified.

In the optical communication devices shown in FIG. 4 to FIG. 7 , in order to reduce the optical coupling dimension between the internal components, the following method can be used for assembly:

Taking FIG4 as an example, as a possible assembly method, the first lens L1 and the optical fiber adapter 600 are used as an integrated first structural component, and the first optical emitting device 100 is optically coupled with the first structural component to form a second structural component. Similarly, the remaining transmitting ends or receiving ends are optically coupled with the newly formed structural components one by one, and finally the optical communication device X4 shown in FIG4 is obtained.

Still taking FIG. 4 as an example, as another possible assembly method, the first lens L1 and the first optical emitting device 100 are used as an integrated third structural component, and the optical fiber adapter 600 is optically coupled with the third structural component to form a fourth structural component. Similarly, the remaining transmitting ends or receiving ends are optically coupled with the newly formed structural components one by one, and finally the optical communication device X4 shown in FIG. 4 is obtained.

Each additional structural component requires an additional 3 coupling dimensions. In the embodiment of the present application, the optical coupling dimensions are reduced by assembling the structural components in an integrated manner, and the time required for assembly is also saved, thereby improving production efficiency.

In addition, for the optical communication device shown in Figures 6 and 7, since the second lens L2 is closer to the optical fiber adapter 600 than the first lens L1, as a possible assembly method during specific implementation, the second lens L2 and the optical fiber adapter 600 can also be used as an integrated fifth structural member, and then the first lens L1 is optically coupled with the fifth structural member, and so on, and the remaining devices are optically coupled with the newly formed structural members one by one, and finally the optical communication device shown in Figures 6 and 7 is assembled.

Based on the optical communication devices X1-X7 provided in the above embodiments, the present application also provides an optical signal processing method. The specific implementation of the method is described below. It should be noted that the method can be applied to the optical communication device provided in any of the above embodiments.

Optical signal processing methods include:

When the first light emitting device and the second light emitting device are both in the emitting state, the light beams emitted by the first light emitting device and the second light emitting device are combined by the optical path component and then sent to the optical fiber adapter;

When a light beam is received from the optical fiber adapter, the light beam is processed and then sent to a corresponding light receiving device among the first light receiving device and the second light receiving device.

It is understandable that the execution of the method depends on the working states of the first optical emitting device and the second optical emitting device, and whether the optical fiber adapter transmits an optical signal. In practical applications, an optical communication device may need to receive and transmit optical signals simultaneously.

In the embodiment of the present application, the optical path component of the optical communication device is mainly used to complete the processing of the light beam. Since the various deformation structures of the optical path component and its processing process of the light beam are described in detail in the above embodiments, the processing process of the light beam is not repeated here for the sake of brevity.

When the optical signal enters from the optical fiber adapter and includes a light wave of the third wavelength (λ3) and a light wave of the fourth wavelength (λ4), the optical path component specifically plays the role of splitting the wavelengths. The third wavelength is the target operating wavelength of the first optical receiving device, and the fourth wavelength is the target operating wavelength of the second optical receiving device. Therefore, the light beam is processed and then sent to the corresponding optical receiving device of the first optical receiving device and the second optical receiving device, specifically including:

When the light beam from the optical fiber adapter includes a light beam with a third wavelength and a light beam with a fourth wavelength, the light beam from the optical fiber adapter is split, the light beam with the third wavelength is sent to the first optical receiving device, and the light beam with the fourth wavelength is sent to the second optical receiving device.

After splitting and sending to the corresponding optical receiving device, the first optical receiving device converts the optical signal of the third wavelength into an electrical signal to complete the service of the PON it serves; the second optical receiving device converts the optical signal of the fourth wavelength into an electrical signal to complete the service of the PON it serves.

In the above method embodiment, the optical communication device provided in the embodiment of the present application is used to complete the processing of the optical signal. Since the optical communication device provided in the embodiment of the present application does not need to set five or more lenses in the optical path component to construct a parallel optical path, the optical path is simple, so the device production cost is low, and accordingly, the processing, transmission and conversion of the optical signal are realized at a low cost.

It should also be noted that, in the embodiment of the present application, the optical parameters of the first converging lens packaged in the first light emitting device 100 and the second light emitting device 200 may be the same or different. The optical parameters of the second converging lens packaged in the first light receiving device 300 and the second light receiving device 400 may be the same or different. In practical applications, the first converging lens and the second converging lens with matching encapsulation optical parameters may be selected according to the requirements of the relative distance of each component in the optical communication device, the optical signal transmission quality, the transmission performance, etc.

It should be understood that in this application, "multiple" means two or more. "And/or" is used to describe the association relationship of associated objects, indicating that there can be three relationships. For example, "A and/or B" can mean: only A exists, only B exists, and both A and B exist, where A and B can be singular or plural. The character "/" generally indicates that the associated objects are in an "or" relationship.

As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features thereof may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims (16)

1. An optical communication device, comprising: a first light emitting device, a second light emitting device, a first light receiving device, a second light receiving device, a light path component, and a fiber optic adapter;

The first light emitting device and the second light emitting device are respectively encapsulated with a light source and a first converging lens, and the first converging lens is used for converging light beams emitted by the light source and providing the light beams to the light path component and the optical fiber adapter;

the optical path component is used for re-transmitting the light beam combination waves from the first light emitting device and the second light emitting device to the optical fiber adapter;

The optical path component is further used for receiving the light beam from the optical fiber adapter and sending the light beam to the first light receiving device and the second light receiving device;

and the first light receiving device and the second light receiving device are respectively packaged with a second converging lens and a photoelectric detection element, and the second converging lens is used for converging the light beams received by the light path component and then providing the light beams to the photoelectric detection element.

2. The optical communication device of claim 1, wherein the optical path assembly comprises: the first optical filter, the second optical filter and the optical filtering component;

The first optical filter is arranged on a transmission path of a first light beam emitted by the first light emitting device and a transmission path of a second light beam emitted by the second light emitting device; the first optical filter is used for transmitting the first light beam and reflecting the second light beam;

The second optical filter and the optical filter assembly are arranged on a transmission path of the light beam from the optical fiber adapter;

wherein the second filter is configured to reflect a light beam of a third wavelength among the light beams from the optical fiber adapter to the first light receiving device;

The filter assembly is configured to reflect a fourth wavelength of the light beam from the fiber optic adapter to the second light receiving device.

3. The optical communication device of claim 2, wherein the optical path assembly further comprises: a first lens disposed between the first filter and the second filter, for converging and providing a light beam from the first filter to the second filter; the second filter is also used for providing the light beam transmission provided by the first lens to the optical fiber adapter.

4. The optical communication device of claim 3, wherein the optical path assembly further comprises: a second lens disposed between the filter assembly and the fiber optic adapter; the second lens is configured to converge the light beam provided by the filter assembly to the fiber optic adapter and to converge and provide the light beam to the filter assembly upon receipt of the light beam from the fiber optic adapter.

5. The optical communication device of any one of claims 2-4, wherein the filter assembly comprises: a third filter and a fourth filter; the third optical filter and the second light receiving device are positioned on the same side of the fourth optical filter;

Wherein the third filter is disposed between the second filter and the fiber optic adapter, and is configured to transmit the light beam of the third wavelength to the second filter, and to reflect the light beam of the fourth wavelength to the fourth filter;

The fourth filter is configured to reflect the light beam from the third filter to the second light receiving device.

6. The optical communication device of any one of claims 2-4, wherein the optical path assembly further comprises: a fifth optical filter;

The fifth optical filter is arranged between the first light receiving device and the second optical filter; the fifth optical filter is perpendicular to the optical axis of the second converging lens packaged in the first light receiving device and is used for further filtering the light beam reflected by the second optical filter.

7. The optical communication device of any one of claims 2-4, wherein the optical path assembly further comprises: a sixth optical filter;

The sixth optical filter is arranged between the second light receiving device and the optical filtering component; the sixth optical filter is perpendicular to the optical axis of the second converging lens packaged in the second light receiving device and is used for further filtering the light beam reflected by the filtering component.

8. The optical communication device of any one of claims 2-4, wherein the optical path assembly further comprises: and the optical isolator is arranged between the first optical filter and the second optical filter and is used for isolating light transmitted from the second optical filter to the first optical filter.

9. The optical communication device of claim 8, wherein the wavelength of the first optical beam and the wavelength of the second optical beam are both within an isolated band of the optical isolator.

10. The optical communication device of any of claims 2-4, wherein the first converging lens encapsulated in the first light emitting device and/or the second light emitting device is an aspheric lens.

11. The optical communication device of any of claims 2-4, wherein the first and second light beams are converging light beams.

12. The optical communication device of claim 3 or 4, wherein the first and second light beams are parallel light beams.

13. The optical communication device of any of claims 2-4, wherein the first and second light emitting devices are each packaged in a TO56 format; the first light receiving device and the second light receiving device are each packaged in the TO46 specification.

14. The optical communication device of claim 3 or 4, wherein the first lens and the fiber optic adapter together are a single first structure, the first light emitting device being optically coupled to the first structure to form a second structure.

15. The optical communication device of claim 3 or 4, wherein the first lens and the first light emitting device together are a single third structure, and the fiber optic adapter is optically coupled to the third structure to form a fourth structure.

16. A method of optical signal processing, characterized in that the method is applied to the optical communication device of any one of claims 1 to 15, the method comprising:

when the first light emitting device and the second light emitting device are in the emitting state, the light path component is utilized to carry out wave combination on the light beams emitted by the first light emitting device and the second light emitting device, and then the light beams are sent to the optical fiber adapter;

When a light beam from the optical fiber adapter is received, the light beam is processed and then sent to a corresponding one of the first light receiving device and the second light receiving device.